The player that controls Kaya loses two life
I find Sygg to be especially potent in multiplayer, and Commander specifically, where lots of people lose 3 or more life a turn, and it's constantly triggering at the end of any turn in which someone was smashed in combat for three
You can also think about self-mill and spells that you can naturally cast from the graveyard, considering mechanics like flashback, encore, and escape
There were even top-level decks that tried to combine it with Static Orb to tie down opponents for the entire game
Mark Rosewater has an indepth article on the mothership explaining the reasons behind the changes, but the summary is: The Fall, Winter, and Spring Sets will all be large sets that are drafted alone (no more "blocks" or "small sets") The Summer Set will be a revamped Core Set (roughly half reprints, half new cards) A different approach to the Gatewatch (pulling back on apperances as planeswalker cards) The Masterpieces Series will revert to being in fewer sets (none in Ixalan) We're changing things behind the scenes (new R&D group "Play Design")
